Gage for boilers



No. 6I3,447. Patented Nov. l, |898.

1 N. H. HILLER.

GAGE FOR BOILEBS.

(Application led Mar. 21, i996.)

UNITED STNFES'A PATENT FFICE.

NICOLAI H. HILLER, OF CARBONDALE, PENNSYLVANIA.A

GAGE FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 613,447, dated November 1, 1898.

Application led March 21, 1896. Serial No. 584,254. (No model.)

In the accompanying draWings,Figure 1 represents the improved gage partly in side View and partly in vertical section. Fig. 2 shows the same partly in front view and partly in vertical section. Fig. 3 represents, on a larger scale, a side viewof one of the valves withv the surrounding parts in vertical section, the valve being in an open position. Fig. 4 shows a similar view with the valve in a closed position.

A denotes the gage-glass, which is secured at its upper and lower ends in the Vusual or any proper manner to the hollow posts B and C, respectively7 the said posts being suitably connected to the boiler or liquid-reservoir above and below the level of the liquid, as by pipes 0J a'. In the respective posts the valves D D are mounted, thev construction and mounting of each valve being the same, so that only a description concerning one is necessary. The stem d of the valve D occupies a bore b in the post B, at the left-hand end of which bore the seat E of the valve is l0- cated, as shown in Figs. 1, 3, and 4f. This bore is preferably somewhat enlarged at h', and from it a duct h2 extends to the glass. In order to allow thepassage of the liquid from the boiler or reservoir to the glass when the valve is open, the valve-stem is provided with a groovev f, and in order that the pressure may act on the rear end of the stem and the valve be thereby balanced the stem is further grooved at f', (or the bore which it occupies is grooved, or suchV portion of the stem fits its bore sufficiently loosely for such purpose.) A similar grooving of the upper valve D allows the steam or gas to enter the upper end of the gage-glass and to press upon the rear end of the stem of this valve, so as to balance it.

The means employed to open and close the valves by hand are located upon the low-pressure side of said valves and consist of spindles G G, one for each valve, each of which carries an affixed arm g, that forks a reduced portion d' Vof the valve-stem. This reduction of the diameter of the stem produces shoul` ders didi which are farther apart than the widthof the arm and can be engaged there by. Levers g' are secured to the respective spindles, and these levers are preferably connected by a rod or rigid link g2, so that both valves may be opened and closed simultaneously by hand. By pushing upward on the lower lever g both valves will be closed and by pulling down upon said lever both valves will be opened. If desired, the lower leverl may have an extension g3, Fig. l, so that by pulling down on said extension the valves will be closed and by pushing up upon it they will be opened.

A petcock h is shown as projecting from the lower post, as usual.

The normal positions of the valvesand the arms g are as shown in Fig. l, the space be'- tween the shoulder d3`and the adjacent side of the arm being a little greater than the distance of the valve from its seat. Should the gage-glass break, the pressure of the liquid against the lower valve wouldautomatically close it, and the pressure of the steam or gas against the upper valve would effect the same result with it, thereby preventing any outward flow of liquid or gas. It will be seen, therefore, that by the construction and arrangement described a single balanced valve in each of the posts, combined with means for opening and closing the valves by hand, located upon the low-pressure side of the same, enables the gage to be speedily and conveniently shut o by a very slight pressure on the valves and whichwill automatically close should the gage-glass break and that by connecting the vmeans for operating each valve both will be moved together when operated by hand.

The valves and their seats may be ground without removing the gage, and the means for operating the valves by hand can be manipulated so as to put additional pressure on IOO the valve when the pressure in the vessel is too low to hold the valve to its seat and may be removed for repairs at any time during the use of the vessel to which the gage is attached without diminishing the pressure.

As shown in Figs. l, 3, and 4, the rear end of each of the stems of the valves is engaged by a spindle L. This engagement may be effected in any suitable manner; but, as illustrated, the stern has a slot 7a, into which a spur Z on the spindle projects, and the rear end of each of the spindles is formed to receive a turning instrument, as by being squared so that a crank M can be applied. These spindles are each surrounded bya stuifing-box, and near the forward end each spindle is provided with a seat Z', which is normally forced by the pressure in the boiler or reservoir into contact with au annular seat 0, surrounding the bore in the post through which the spindle passes, thereby preventing any escape of liquid or gas by the spindles. When a valve is to be ground on its seat, the valve is closed by hand and the crank is applied to the spindle and turned. The boiler or reservoir pressure upon the valve-head forces the valve into close contact With its seat, and the grinding is eifected under and by such pressure by sim ply rotating the crank.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. A water-gage for boilers, tbc., composed essentially of a gageglass and connected hollow posts and valves for opening and closing the respective communications with the boiler, said valves having stems or spindles made in two sections, one valve-section having an independent reciprocating movement in opening or closing the valve and intermeshing with the other section so that both sections maybe rotated together for grinding the valve to its seat in combination with means for rotating the spindle and hand devices for reciprocating the valve-section, substautially as described.

2. In a gage, the combination with the glass and the connected hollow post adapted to be attached to the boiler or reservoir of a valve having a spindle or stem made in two sections eonuected together and provided with means for rotating the valve on its seat and independent means for opening and closing the same, one of said sections intermeshing with the other and havinga free reciprocating movement and provided with a groove or bypass communicating with the boiler and its rear end to balance the valve, wherebythe valve will close automatically upon rupture of the glass, substantially as described.

NICOLAI Il. HILLER.

lVitnesses:

EDsoN SALisBURY JONES, CHAs. XV. FORBES. 

